摘要
为研究含钒钢渣钙化焙烧参数对提钒效率的影响,以来自河北承德的含钒钢渣为原料、CaO为焙烧添加剂,利用微波设备加热酸浸,考察了焙烧温度、时间及配钙比对V、Fe元素浸出的影响规律,并揭示了其作用机制。热力学计算表明,在700~1100℃范围内,尖晶石相已经氧化分解。试验结果表明,在不同的焙烧温度下,V元素的浸出率从36.96%提高到40.56%;当延长焙烧时间至5 h后,浸出率反而下降,这是因为随着长时间的氧化焙烧,生成了难溶解的硅酸盐相;当焙烧温度为1000℃、时间为3 h、配钙比为8%时,V元素的浸出率最高可达50.06%,同条件下Fe元素的溶出率为19.89%。试验不仅有效回收了钒资源,而且抑制了杂质元素的溶出。
In order to study the influence of calcified roasting parameters for vanadium-containing steel slag on the efficiency of vanadium extraction,vanadium-containing steel slag from Chengde,Hebei Province was taken as raw material and CaO was added as roasting additive.The microwave equipment was used to heat acid leaching.The leaching rules of elements V and Fe were investigated by different roasting temperature,time and calcium ratio,and the mechanism of action was revealed.Thermodynamic calculation result shows that spinel phase has been oxidized and decomposed in the temperature range of 700-1100℃.The experimental results show that the leaching rate of V increases from 36.96%to 40.56%under different roasting temperatures.When the roasting time is extended to 5 h,the leaching rate decreases,because the refractory silicate phase is formed with the longtime of oxidation roasting.When the roasting temperature is 1000℃,the time is 3 h,and the calcium ratio is 8%,the leaching rate of V can reach 50.06%,and the dissolution rate of Fe is 19.89%under the same conditions,which not only effectively recovers vanadium resources,but also inhibits the leaching of impurities.
作者
梁精龙
邵雪莹
王乐
李相臣
LIANG Jing-long;SHAO Xue-ying;WANG Le;LI Xiang-chen(Key Laboratory of Ministry of Education for Modern Metallurgy Technology,College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063000,Hebei,China)
出处
《中国冶金》
CAS
CSCD
北大核心
2023年第4期111-118,共8页
China Metallurgy
基金
国家自然科学基金资助项目(52174314)
河北省高等学校科学技术研究项目(ZD2021331)。
关键词
钙化焙烧
钢渣
微波
酸浸
钒浸出率
calcified roasting
steel slag
microwave
acid leaching
vanadium leaching rate
